Furnace-grate



(No Hoden I'. W.JA-RVIS. FURNAGB GRATB.

Patented Oct. 14

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PURNAGB GRATB. No. 569.205. P-atene-diopt-1a, 1896.

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w i Vim N m@ N m m N F L UNITED "STATES"` PATENT OFF-1G13."

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FU RNACE-G RAVTEl SPECIFICATION forming part of4 Letters Patent No. 569,205, dated October 13, 1896.v ippucaionpiea february ze, 1896. sern Nt. 530,818; (No model.)

Hy object is to providea construction of grate in the class referred to whereby itshall be adapted, in shaking it, not only to causethe grate-bars carrying the lingers to rock, but also to be reciprocated horizontally in relatively opposite directions,and thus enable the grate to be relieved readily of clinkers.

Referring to the accompanying drawings, Figure 1 is a broken section taken at the line 1 on Fig; 13 and viewed in the direction of the arrow, showing my improved grate construction in elevation; Fig. 2, a view in side elevation showin g one of the sliding bearing-bars for the grate-bars in elevation with grate-bars indicated thereon `by dot-ted lines and its connection with the rock-shaft; Fig. 3, a similar view lof another of the sliding bearing-bars; Fig. 4, a broken view, in side elevation, of a portion of the base-frame of the grate; Fig. 5, a top plan view oi' the por-I tion of the base-frame presented in Fig. 4.;y Fig. 6, a section taken at the line 6 on Fig. 10 and viewed in the direction of the arrow; Fig. 7, a section taken at the line 7 on Fig. 13 and at the line 7 on Fig. 6 and viewed as indicated by the arrows; Fig. 8, a sectional view, diagrammatic in its nature, showing the grate-bars with their imposed lingers in pairs with the members of the pairs overlapping each other as to the finger portions inthe positions they are caused to assume by bringing the reciprocating feature of my improve-v ment into play; Fig. 9, a similar view illustrating the rocking function in my improved grate; Fig. 10, a section taken at the line 1Q on Fig. 1 and viewed in the direction of the arrow; Fig. 11, a section taken at the line 11 on Fig. l and viewed in the direction of the arrow; Fig. 12, a plan view of onel of the grate-bars; Fig. 13, a sectional plan view of my improved grate; Fig. 14, a broken section taken at the line 14 on Fig. 10 and viewed in 'the directionrof the arrow; Fig. 15, asection taken at the line 15 on Fig. 10 and viewed ini the direction of the arrow; Fig. 16, a section. taken at the line 16 on Fig. 18 and viewed in' the direction of the arrow; Fig. 17, a view in" i side elevation of a single-finger detail; Fig.A

18, a broken plan View of a sectionofagratebar near one end thereof, showing yits rounded bearing-surfaces; and Fig. 19, a bottom planl view of the finger presented bygFig. 17 f A is the baseer supporting frame' vfor the.

grate, which I prefer to form of two T-'sha'ped bars A', disposed parallel to each othe'igwith their web portions r extending upward, and

their head portions r thus aording extended bases secured at their opposite ends to legsk q; and the bars A are connected at theirend's by flat bars A2, extending at right. angles tol In` the legs q4 the inverted -T- shaped bars.

at one end of the frame is journaled a rock-Av g rock with the shaft.

of lugs t, is supported a sliding bar C, pro# vided with elongated slots u, a pendentlug.`

m, and with upward-projecting bearingsl, concaved at their upper extremitie'sto afford seats for the grate-bars hereinafter,described:y Y

At the inner side of each frame-bar is'y supported on the baser a sliding bar. C', having a pendent'lug m', elongated slotstn",`

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and upward-projecting bearings l', likethel bearings Z on the bars C. The sliding bars f C and C Aare-connected together` on. 'each Y `frame-bar A' through its web rby, bolts a),

passing through the coincident slots nin', and each pair of the sliding bars has its members relatively so placed thatthe bear-V :f 1 i ings ZQand Z' alternate withvea'ch o ther,1tl l1o`se:v on the opposite bars C 'coincidinglwitheach other and those on thel opposite barsGl similarlycoinciding.

Each lug m is connected by a link k with the adjacent cross-head at a point below the rock-shaft B, and each lug lm. is connected with the adjacentcrossfhead by a link lo' at a point above the rock-shaft, and,

from the lower end of the cross-head o v ,therel extends to the front endof the gratefa'rd B', connected at its outer end with thef.opeIj-. ating-lever B2, which is fulcrumed'at a?. y

D and D are the grate-bars, each being of the following construction: Between its ends and throughout the larger portion of its extent this grate-bar is rectangular in crosssection, as also at its end portions, while between the angular portions it is provided near its opposite ends with the cylindrical sections s and s', at the opposite sides of which are formed the V- shaped recesses s2. The rounded portions of each grate-bar at the outer sides of the recesses s2 aiiord journals s3 and the similar portions at the inner sides of the recesses afford journals s4. The bars D seat at their journals s3 in the bearings Z of the sliding bars C, while the bars D' seat at their journals s4 in the bearings l of the sliding bars C. At equal Aintervals on the opposite sides of each grate-bar are provided the vertical ribs fi, alording spacing means for the grate-fingers E, each comprising a pair of fingers extending from a base containing a rectangular socket fi', eX- tending transversely of the fingers and affording a seat to straddle the angular portion of a grate-bar on which it is coniined against lateral play by the ribs if.

The bars D and D are so arranged relatively that the iingers on one alternate with those on the next7 and so on throughout the grate.

Depending from each grate-bar D, to one side of its center, is a rigid hanger 71, and to the lower ends of these hangers is pivotally connected a bar F, having a pendent lug g, from which it is connected by a link f with the upper end of a cross-head o2, loosely fulcrumed upon the rock-shaft B. Depending from the grate-bars D' are the rigid hangers h', carrying pivotally at their lower ends a connecting-bar F', having a depending lug g', from which it is connected by a link f with the cross-head o2 below the rock-shaft, andthe cross-head 02 is connected by a rod B3 with an operating-lever B4 at the front end of the grate and fulcrumed at fr'. For the purpose of locking each grate-bar at its opposite ends to the sliding bars C the latter are provided below their bearings Z with inward-projecting arc-shaped flan ges d to enter recesses d', formed on the -base portions of the grate-bars.

Where a grate-finger seats in the recesses s2 near the opposite ends of each grate-bar, it is formed single, as shown at E' in Fig. 17, with V-shaped projections 2 on the inner sides of its socket z" to enter the recesses s2 when the single grate-iin ger is placed in position on the grate-bar to straddle it.

From the foregoing it will be seen that when the levers B2 and B4 are simultaneously actuated to shake7 the grate the effect of rocking the shaft B is to slide the bars C and C in opposite directions, thereby moving the grate-bars D and D with their imposed grateiingers in pairs toward each other into the relative positions illustrated in Fig. 8,wherein spaces are aiorded between them forthe evacuation of clinkers, and the intermeshin g fingers clean out between them and toward each other into the normally relative positions in which they are represented in Fig. 7. It will also be understood that by working the lever B4 alone the grate-bars are rocked, thereby tilting the members of the respective pairs toward each other into the relative positions illustrated in Fig. 9 and turning them back into the normal positions in which they are represented in Fig. '7 for the purpose of clearing the grate of ashes and breaking up the bed when caked.

Stationary ngers E2 and E2 project inward from the side bars A2 of the frame A to extend over the spaces between the grate-fin gers on the end bars D' D andthe respective adjacent ends of the grate. Moreover, the upward inclination of the stationary fingers E2, which are over an air-space b at the inner end of the grate, permits the upper portions of these fingers to extend above the plane of the fire-bed, whereby air, in entering the irechamber through the stationary ingers, is

diused and strikes the products of combusframe to slide lengthwise thereon, means forv sliding said sustaining-bars in relatively-contrary directions, grate-bars on said sustaining-bars, and grate-fin gers supported to alternate with each other on the successive gratebars, substantially as and for the purpose set forth.

2. In a furnace-grate, in combination with a supporting-fram e, grate-bar-sustainin gbars supported in pairs at opposite sides of the frame to slide lengthwise thereon, means for sliding the members of said pairs of sustainingbars in relatively-contrary directions, grate-bars journaled on said su stainin g-bars, means for rocking the members of pairs of said grate-bars in relatively-contrary directions, and grate-fin gers supported to alternate with each other on the snccessive grate-bars, substantially as and for the purpose set forth.

3. In a furnace-grate, in combination with a supporting-frame, the pairs of bars C and C having the members of each pair supported on the opposite sides of the side bars of said frame .to slide lengthwise thereon,- a rockshaft B carrying the cross-heads o and o', links lo and k connecting said bars Gand C with said cross-'heads respectively at opposite sides of said rock-shaft, a rod B extend- TOO IIO

ing from one of said cross-heads, an operating-lever B2 connected with said rod, gratebars on said bars C and C and grate-tingers vsupported to alternate with each other on the supported in pairs at opposite sides of the frame to slide lengthwise thereon, means for sliding the members of said pairs of sustaining bars in relativelycontrary directions, grate-bars j ournaled on said sustaining-bars, grate iingers supported to alternate with each other on the successive grate-bars, a rock-shaft B carrying loosely a cross-head o2, a bar F pivotally suspended from alternate grate-bars, a bar F pivotally suspended from grate-bars alternating with those carrying the bar F, a link f connecting said bar F with said cross-head at one side of the rock-shaft, a link f' connecting said bar F with said cross-head at the opposite side of the rockshaft, a rod B3 extending from the cross-head and an operating-lever B4 connected with said rod, substantially as and for the purpose set forth.

5. In a furnace-grate, in combination with a supporting-frame, the pairs of bars C and C having the members of each pair supported on the opposite sides of the side bars of said frame to slide lengthwise thereon, a rock-shaft B carrying, to rock with it, the cross-heads 0 and o' and, loosely, the cross-head o2, links k and k connecting said bars C and C with said cross-heads o and o', respectively, at opposite' sides of said rock-shaft, a rod B extending from the cross-head o, an operating-lever B2 connected with said rod, grate-bars j ournaled on said bars C and C', grate-ingers supported to alternate with each other on the successive grate-bars, a bar F pivotally suspended from alternate grate-bars, a bar F pivotally suspended from grate-bars alternating with those carrying the bar F, a link f connecting said bar F with the cross-head o2 at one side of the rock-shaft, a link f' connecting said bar F with said cross-head 02 at the opposite side of the rock-shaft, a rod B2 extending from the cross-head o2 and an operating-lever B4 connected with said rod, substantially as and for the purpose set forth.

6. In a furnace-grate, in combination with a supporting-frame, grate-bars each formed angular in cross-section between andat its end portions and rounded at its opposite ends between the angular portions, recesses S2 in the sides of said rounded portions and spacing-ribs c' on the intermediate angular portion, double grate-fingers E having sockets i at which they straddle said grate-bars beptween the ribs thereon and single grate-iingers E' having sockets z" provided with, projections 112 and at which they seat in said recesses s2, the grate-lingers alternating with each other on the successive grate-bars, substantially as described.

7. In a furnace-grate, the combination of a frame A comprising the T- bars A', connecting-bars A2 and legs q, slotted sustaining-bars links k and la' connecting saidsustaining-bars with said cross-heads respectively at opposite sides of said rock-shaft, a rod B extending from one of said cross-heads, an operatinglever B2 connected with said rod, grate-bars on said sustaining-bars and grate-fingers supported to alternate with each other on the successive grate-bars, substantially as aud for the purpose set forth.

8. Afurnace-grate comprising, in combination with a supporting-frame, the pairs of sustaining-bars C and C provided, respectively, with the upward-projecting bearings Z and l and having the members of each pair sup'- ported on the opposite sides of the side bars of said frame to slide lengthwise thereon and to cause saidbearings on the members of -the pairs of sustaining-bars to alternate with each other, a rock-sh aft B carrying the cross-heads o, o and o2, links llc-and lo connecting said bars C and C with said cross-heads o and o', a rod B extending from the cross-head o, an operating-lever connected with said rod, gratebars D and D journaled on said bearings l and Z and locked to said bars C', grate-lingers supported to alternate with each other on the successive grate-bars, and stationary guidengers E2 and E4 at the opposite ends of the grate, hangers h and h' depending, respectively, from the grate-bars D and D', bars F and F' pivotally connected, respectively, with said hangers h and h', links f and f connecting the bars F and F with the cross-head o2, a rod B3 extending from said cross-head 02 and an operating-lever connected with said rod B2, the whole being constructed and ar` ranged to operate substantially as and for the purpose set forth.

FRANKLIN w. JARvIs.

' In presence of J. H. LEE, yRICHARD SPENCER.

IOO Y 

